<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>顶部导航栏</title>
    <!--引入ElementUI的css文件-->
    <link rel="stylesheet" href="../element-ui/lib/css/index.css">
    <!--引入vue和ElementUI的js文件-->
    <script src="../js/vue.js"></script>

    <script src="../element-ui/lib/index.js"></script>
</head>
<body>
    <div id="div">
        <el-menu
                :default-active="activeIndex"
                class="el-menu-demo"
                mode="horizontal"
                @select="handleSelect"
                background-color="green"
                text-color="yellow"
                active-text-color="blue">
            <el-menu-item index="1">处理中心</el-menu-item>
            <el-submenu index="2">
                <template slot="title">我的工作台</template>
                <el-menu-item index="2-1">选项1</el-menu-item>
                <el-menu-item index="2-2">选项2</el-menu-item>
                <el-menu-item index="2-3">选项3</el-menu-item>
                <el-submenu index="2-4">
                    <template slot="title">选项4</template>
                    <el-menu-item index="2-4-1">选项1</el-menu-item>
                    <el-menu-item index="2-4-2">选项2</el-menu-item>
                    <el-menu-item index="2-4-3">选项3</el-menu-item>
                </el-submenu>
            </el-submenu>
            <el-menu-item index="3">消息中心</el-menu-item>
            <el-menu-item index="4"><a href="https://www.itheima.com" target="_blank">首页</a></el-menu-item>
        </el-menu>
    </div>
</body>
<script>
    new Vue({
        el:"#div",
        data:{
            activeIndex: '2-4-2' //默认选中
        },
        methods: {
            handleSelect(key, keyPath) {
                console.log(key, keyPath);
            }
        }
    });
</script>
</html>